Question about high pressure regs

Im currently using a high pressure gun for woodsball. Im using a ninja 50 45 with the stock reg which is around 1000 psi? Whenever the tank drops below about 900 psi the gun wont cock if im shooting fast... Its fine if i wait a second or so between shots though. Does the tank have to have 1000 psi in order to produce high pressure from te reg??

The stock reg is around 800-900 psi. If you want a higher pressure you need the SHP reg.
Tippamanns love to run around 850-900 psi. So when you're shooting at 900 psi in the tank, that's where the tippmann valve loves to be. As you decrease the pressure in the tank the regulator is no longer regulating, it's just flowing a lower and lower psi which is starving your marker. So it's not the regs fault, you're shooting much too deep into the tank for your marker to cycle properly.

Define 'upgrade'. If they're not meant to help with air consumption then they don't really apply to the topic. There are some minor upgrades that make the marker use the air more efficiently but unless you're doing things to the valve and how the marker internally regulates the air then the effect on the operating pressure is negligible.
Kind of like some of the upgrades for the Tippmanns and the cyclone feeds. As those run off the blowback air and not the actual air that operates the marker.

Define 'upgrade'. If they're not meant to help with air consumption then they don't really apply to the topic. There are some minor upgrades that make the marker use the air more efficiently but unless you're doing things to the valve and how the marker internally regulates the air then the effect on the operating pressure is negligible.
Kind of like some of the upgrades for the Tippmanns and the cyclone feeds. As those run off the blowback air and not the actual air that operates the marker.

Nah i dont think it has anything to do with the air. I have the electronic trigger and a longer barrel. Threw a stock on it too. The electro trigger is the only thing that may affect it

That has nothing to do with it. It's all in the valve and how the marker is using air during the firing process. When you're shooting that deep into the tank, again, you are at or under the markers operating pressure.
So firing it rapidly is not allowing the pressure to build up when it's that low. That's why it's not recocking but it will recock, up to a point, one balling it. Again, you're just shooting too deep into your tank and your marker is starving for air that isn't there.